A Cal Jam tweet announced that Jett’s new documentary, Bad Reputation, would be screened during the weekend and added, “Wish we were getting the real thing too.” The Foo Fighters retweeted with the comment, “What else could be have up our sleeves? Stay tuned … ”

Later, the Foo Fighters shared a video from Nirvana’s Hall of Fame aftershow party, saying simply, “This is a Jam.”

The 2014 reunion show consisted of 19 songs. Jett led the band through the first five tracks – “Smells Like Teen Spirit,” “Breed,” “In Bloom,” “Territorial Pissings” and “All Apologies” – while McAulay later fronted “Serve the Servants,” “Milk It,” “Very Ape,” “Scentless Apprentice” and “Tourette’s.” The show also featured Lorde, Kim Gordon and St. Vincent.

Grohl looked back at the moment last year. "I got together with my old bandmates, Krist and Pat, and guests including Joan Jett and Lorde, and we played those songs again," he recalled. "It sounded just like it did, but of course with one thing missing. We hadn’t played a Nirvana set since Kurt [Cobain] died. Could we do that again? I don’t know.”